File Name: derivatives of exponential and logarithmic functions practice problems .zip
- 3.9E: Exercises on Derivatives of Logarithms and Exponential Functions
- How to Differentiate with Logarithmic Functions
- Derivatives of Exponential Functions
3.9E: Exercises on Derivatives of Logarithms and Exponential Functions
So far, we have learned how to differentiate a variety of functions, including trigonometric, inverse, and implicit functions. In this section, we explore derivatives of exponential and logarithmic functions. As we discussed in Introduction to Functions and Graphs , exponential functions play an important role in modeling population growth and the decay of radioactive materials. Logarithmic functions can help rescale large quantities and are particularly helpful for rewriting complicated expressions. Just as when we found the derivatives of other functions, we can find the derivatives of exponential and logarithmic functions using formulas.
We can now use derivatives of logarithmic and exponential functions to solve various types of problems eg. For problems , find the derivative of the given function:. The natural logarithm function is defined as the inverse of For help in the distinction and memorization of the derivatives of the exponential and logarithmic Note. Soon, you will find all derivatives problems easy to solve. Derivatives of Exponential and Logarithm Functions Basic formulas for finding depravities of exponentials and logarithms are given. Calculus: Integral with adjustable bounds.
The derivative of ln x. The derivative of e with a functional exponent. The derivative of ln u x. The general power rule. In the next Lesson , we will see that e is approximately 2. The system of natural logarithms is in contrast to the system of common logarithms , which has 10 as its base and is used for most practical work. We denote the logarithmic function with base e as "ln x.
How to Differentiate with Logarithmic Functions
We can now use derivatives of logarithmic and exponential functions to solve various types of problems eg. Cessna taking off. A Cessna plane takes off from an airport at sea level and its altitude in feet at time t in minutes is given by. At low altitudes, where the air is more dense, the rate of climb is good, but as you go higher, the rate decreases. Note: In aviation, height above sea level is meaured in feet. It is regarded as a metric unit and is used universally in aviation instrumentation and charts. Problems can occur when civilian charts show heights of mountains in metres.
Derivatives of Exponential Functions
As with the sine, we don't know anything about derivatives that allows us to compute the derivatives of the exponential and logarithmic functions without going back to basics. Yes it does, but we will not prove this fact. We can look at some examples. As we can already see, some of these limits will be less than 1 and some larger than 1. What about the logarithm function?
The derivative of a logarithmic function is the reciprocal of the argument. As always, the chain rule tells us to also multiply by the derivative of the argument. Differentiate by taking the reciprocal of the argument.
As with the sine function, we don't know anything about derivatives that allows us to compute the derivatives of the exponential and logarithmic functions without going back to basics. Let's do a little work with the definition again:. Yes it does, but we will prove this property at the end of this section.